- Removed file system execute permission for all files (no directories)

- application/extensions file system permission now is 775
- application/logs file system permission now is 775
- Added extensions directory in application/: config, controllers, helpers, hooks, libraries, models, views and widgets
- Added view views/extensions/manage.php
- Added controller controllers/system/extensions/Manager.php
- Added library ExtensionsLib to manage extensions
- Added model models/system/Extensions_model.php
- Moved code related to print out info from MigrationLib to EPrintfLib

application/models/system/Extensions_model.php

@@ -0,0 +1,56 @@
+<?php
+
+class Extensions_model extends DB_Model
+{
+	/**
+	 * Constructor
+	 */
+	public function __construct()
+	{
+		parent::__construct();
+		$this->dbTable = 'system.tbl_extensions';
+		$this->pk = 'extension_id';
+	}
+
+	/**
+	 * getDependencies
+	 */
+	public function getDependencies($dependencies)
+	{
+		if (isError($ent = $this->isEntitled($this->dbTable, PermissionLib::SELECT_RIGHT, FHC_NORIGHT, FHC_MODEL_ERROR))) return $ent;
+
+		return $this->execQuery(
+			'SELECT *
+			   FROM '.$this->dbTable.'
+			  WHERE enabled = TRUE
+				AND name IN ?',
+			array('name' => $dependencies)
+        );
+	}
+
+	/**
+	 *
+	 */
+	public function getInstalledExtensions()
+	{
+		$query = 'SELECT extension_id, e1.name, e1.version, description, license, url, core_version, dependencies, enabled
+					FROM system.tbl_extensions e1
+			  INNER JOIN (
+				  SELECT name, MAX(version) AS version
+				  	FROM system.tbl_extensions
+				GROUP BY name) e2
+					  ON (e1.name = e2.name AND e1.version = e2.version)';
+
+		return $this->execQuery($query);
+	}
+
+	/**
+	 *
+	 */
+	public function executeQuery($sql)
+	{
+		if (isError($ent = $this->isEntitled($this->dbTable, PermissionLib::SELECT_RIGHT, FHC_NORIGHT, FHC_MODEL_ERROR))) return $ent;
+
+		return $this->execQuery($sql);
+	}
+}